66709576316 has 6 divisors (see below), whose sum is σ = 116741758560. Its totient is φ = 33354788156.

The previous prime is 66709576313. The next prime is 66709576321. The reversal of 66709576316 is 61367590766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66709576313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8338697036 + ... + 8338697043.

It is an arithmetic number, because the mean of its divisors is an integer number (19456959760).

Almost surely, 2^66709576316 is an apocalyptic number.

It is an amenable number.

66709576316 is a deficient number, since it is larger than the sum of its proper divisors (50032182244).

66709576316 is a wasteful number, since it uses less digits than its factorization.

66709576316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16677394083 (or 16677394081 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 56.

The spelling of 66709576316 in words is "sixty-six billion, seven hundred nine million, five hundred seventy-six thousand, three hundred sixteen".